A few questions regarding the new SX models

[tomsixtwo]

I'm very interested in the PSR-SX700, but have some questions that are not answered in the manual:

Is it possible to quantize multipad recordings (while recording or afterwards)?
Is it possible to use the arpeggiator/harmony function while recording multipads?
Does the App Chord Tracker already support the SX models?
Do the speakers differ significantly between the SX700 and SX900?

Thanks ...